Gregory Allen Johnson, MD
Internal Medicine Physician · Piedmont, SC
Gregory Allen Johnson, MD is an internal medicine physician with a practice address in Piedmont, South Carolina, and NPI 1205936556, issued on Sep 25, 2006. Check the license (South Carolina 27071, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Gregory Allen Johnson
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 27071 SC
Self-reported in NPPES; status is on the state search - Practice location
- 1115 Wren School RD, Piedmont, SC 29673
- Phone
- (864) 859-0740
- Enumerated
- Sep 25, 2006
- Record last updated
- Mar 23, 2024
- Medicaid ID
- 270717 SC
- Medicare enrollment
- Enrolled (PECOS I20080910000425); accepts Medicare assignment
- Medical or professional school
- Medical University Of South Carolina College Of Medicine, 2004
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,881 in South Carolina → Look up another NPI →
Also registered at 1115 Wren School RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Robert Briggs, M.D.Internal Medicine Physician1720309313
- Clay Crosby, M.D.Internal Medicine Physician1801200522
- John Goldsmith, M.D.Internal Medicine Physician1275792814
- Quinn Hunt, MDInternal Medicine Physician1588194518
- Abigail Stoker, MDInternal Medicine Physician1407478217
- Janie Thomas, PAPhysician Assistant1467902684
Verify Gregory Allen Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 27071Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
23% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,445 Medicare Part D claims for 157 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Atorvastatin Calcium192 claims
- Amlodipine Besylate175 claims
- Losartan Potassium137 claims
- Omeprazole106 claims
- Levothyroxine Sodium84 claims
- Lisinopril77 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $16.68
1 payment: food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Prisma Health University Medical GroupPiedmont, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Allen Johnson among 1,881 internal medicine physician records in South Carolina
Gregory Allen Johnson, MD is one of 1,881 internal medicine physician records with a practice address in South Carolina. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 58% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2004 · median 2006 among the 1,119 with a school on file
- Record last updated2024 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
7 internal medicine physician records list a practice address in Piedmont
They are 7 of the 139 NPPES records with a practice address in Piedmont, and 1,881 internal medicine physician records in South Carolina.
All 1,881 in South Carolina → Every provider in Piedmont → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Robert Briggs, M.D.Piedmont, SC 296731720309313
- Clay Crosby, M.D.Piedmont, SC 296731801200522
- John Goldsmith, M.D.Piedmont, SC 296731275792814
- Quinn Hunt, MDPiedmont, SC 296731588194518
- Abigail Stoker, MDPiedmont, SC 296731407478217
- Horace Walpole, MDPiedmont, SC 296731255307898
- Mark Ayers, MDSeneca, SC 296721669658753
- Helen Johnson-Wall, M.D.Seneca, SC 296721730151481
Common questions
What is Gregory Allen Johnson, MD's NPI number?
Gregory Allen Johnson, MD's National Provider Identifier (NPI) is 1205936556, issued on Sep 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Allen Johnson, MD located?
The NPPES record lists a practice address at 1115 Wren School RD, Piedmont, SC, 29673. Phone: (864) 859-0740. Providers update this record themselves, so call before visiting.
How can I verify Gregory Allen Johnson, MD's license?
NPPES lists South Carolina license number 27071, as entered by the provider. Search the South Carolina Board of Medical Examiners at https://verify.llronline.com/LicLookup/Med/Med.aspx?div=22. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory Allen Johnson, MD prescribe under Medicare Part D?
In 2024, Gregory Allen Johnson, MD had 2,445 Medicare Part D claims for 157 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.